18 February, 2026
Outermost layer of cells on a plant, forming a protective barrier that covers the entire plant organ
Parenchyma cells in leaves = Mesophyll cells Contain chloroplast and carry out photosynthesis
Undifferentiated cells divide until gene expression ‘tells’ them what cells to turn into
Vascular cambium creates new xylem and phloem (tree rings) and cork cambium creates cork (bark)